Understanding the Differences Between NFPA 70E &
CSA Z462 Including a Peek Into the 2021 Editions
Webinar
April 16, 2020
Who am I? www.twbesc.ca
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• Terry Becker, P.Eng., CESCP, IEEE Senior Member.
• 28 Years experience in Electrical Engineering.
• Mobil Oil, DPH, PanCanadian Energy, EnCana, ESPS, Danatec, TW Becker Electrical Safety Consulting Inc..
• CSA Z462 Workplace electrical safety Standard, First-Past Vice Chair, Voting Member, Clause 4.1 & Annexes WG Leader.
• CSA Z463 Maintenance of electrical systems Standard, Voting Member [Canadian version of NFPA 70B].
• IEEE 1584 Guide for Arc Flash Hazard Calculations Standard. Voting Member. [Also IEEE 1584.1 Sub-Committee]
Who am I? www.twbesc.ca
Check my LinkedIn Profile
• Implement External Electrical Safety Audits.
• Develop and implement Electrical Safety Programs.
• Develop and provide Electrical Safety Program Roll Out Training.
• SME and visionary of Electrical Safety Training System (ESTS) e- Learning.
• Develop and deliver 1 & 2 Day Low Voltage & High Voltage Arc Flash & Shock Training.
• Developed and implement Electrical Safety Competency Validation Process.
• Presented at Conferences and Workshops in Canada, USA,
Australia and India on Electrical Safety, CSA Z462 and NFPA 70E.
Disclaimer
• The information presented is the technical seminar is the
opinion and interpretation of the information presented by TW Becker Electrical Safety Consulting Inc., and Terry Becker,
P.Eng.. CESCP, IEEE Senior Member.
• TW Becker Electrical Safety Consulting Inc. and Terry Becker, P.Eng. accept no liability for the information provided.
• You are advised to consult the NFPA and the published 2021 Edition of NFPA 70E when it publishes for specific formal
interpretation.
• You are advised to consult CSA Group and the published 2021 Edition of CSA Z462 when it publishes for specific formal
Disclaimer
• Not all potential changes will be reviewed.
• Information on potential changes is available on NFPA’s website based on First Revision and Second Revision reports and
information provided.
Agenda
• Introduction.
• Technical harmonization.
• NFPA, NFPA 70E Technical Committee and process.
• CSA Group, CSA Z462 Technical Committee and process.
• Interpretation and Application.
• IEEE 1584 and IEEE 1584.1.
• NFPA 70E 2021 Public Comments, Second Revision, Expected Changes.
• CSA Z462 Key Differences & 2021 Expected Changes.
• Conclusion.
Introduction NFPA 70E
• Public may not be aware of the processes followed.
• NFPA 70E first published in 1979. Focused on “installations.”
• 1979, NFPA 70E Standard for Electrical Safety Requirements for Employee Workplaces.
• 2004, NFPA 70E Standard for Electrical Safety in the Workplace title change (IEEE 1584 published 2002).
• 2021 will be the 12th Edition of NFPA 70E.
• GOOD NEWS! The 2021 Edition will not include substantial technical changes. Slowing down. Clean up,
reorganization of content. New information on capacitors!
Introduction CSA Z462
• NFPA & CSA sign MOU in 2005.
• Harmonization of Standards for North America.
• NFPA 70E selected.
• CSA Z462 Workplace electrical safety, Technical Committee constituted 2006.
• CSA Z462 First Edition, December 2008 (70E, 2009).
• CSA Z462, 2012 some additional Annexes e.g. Annex A Aligning
Implementation of this Standard with Occupational Health and Safety Management Standards, Annex Q Equipment Labeling.
• CSA Z462, 2018, 4th Edition.
Technical Harmonization
2012 2015 2018
NFPA & NFPA 70E Public Input /
Public Comment Process
NFPA 70E 2021 Edition Second
Revision Draft
• NFPA website, NFPA 70E.
NFPA 70E 2021 Edition Second
Draft Ballot
• https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and- standards/detail?code=70E&tab=nextedition
NFPA 70E 2021 Edition Second
Draft Ballot
• https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and- standards/detail?code=70E&tab=nextedition
NFPA 70E 2021 Edition Second
Draft Report
• https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and- standards/detail?code=70E&tab=nextedition
NFPA 70E 2021 Edition Second
Draft Report
• NFPA website, NFPA 70E.
CSA Group – Request For
Amendments Process
• Formal process.
• Not as structured as NFPA 70E process, website.
• All “Requests for
Amendments” reviewed by CSA Z462 Technical
Committee.
• Review NFPA 70E Public Comments for inclusion.
Interpretation & Application
• NFPA 70E and CSA Z462 are NOT adopted into OHSA or OH&S Regulations.
• Industry accepted best practices Standard. Benchmarking.
• Due diligence approach for application.
• Interpretation important.
• Requires Electrical Safety Program to be developed and implemented.
• Work task based.
• Risk Assessment Procedure required.
• Shock and Arc Flash Risk Assessments, risk assessment processes.
IEEE 1584 & IEEE 1584.1
• Not many Electrical Engineers know IEEE 1584.1 exists.
Interpretation & Application
• Specific to IEEE 1584 arc flash hazard calculations.
• Historical error related to including HRC# correlated to calculated incident energy.
• Clarified in NFPA 70E and CSA Z462 2018 Editions.
• DO NOT include an HRC#, CAT # or Level “letter” in the
”Results Table” on arc flash & shock equipment label.
• NFPA 70E Table 130.5(G) or CSA Z462 Table 3 advise that
when incident energy analysis method is used arc flash PPE is specified with two arc-rated levels in cal/cm2.
• Level 1 – 1.2 to 12.0 cal/cm2 ATPV. Everyday/Task wear.
• Level 2 - > 12.0 cal/cm2 ATPV. Arc flash suit.
Interpretation & Application
Interpretation & Application
1.2 – 12.0 cal/cm2Arc Thermal Performance Value > 12.0 to 140 cal/cm2Arc Thermal Performance Value
Interpretation & Application
• 40 cal/cm2 is NOT a
“Dangerous” incident energy level where “No PPE Exists!”
• Myth. Arc blast pressure correlates to arcing fault current, Dr. Ralph Lee research in 1980s.
• Misapplication of HRC 4.
• IEEE 3007, was Yellow Book..
Interpretation & Application
• Examples of compliant arc flash & shock equipment labels.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• NOTE:
• Due to reorganization of content Article numbers will be changed in Article 110.
• Article numbering changes will be reflected in specific Articles in Article 120 and 130 to cross correlate.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 100 DEFINITIONS
• Balaclava (wording changes, clarification)
• Barrier (minor wording deletion, clarify context)
• Electrically Safe Work Condition (wording, temporary state)
• Equipment, Arc Resistant (SWGR replaced, Equipment)
• Fault Current Available (clarify may be different due to location)
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 100 DEFINITIONS
• Field Evaluation (note clarification, additional resources)
• Shock Hazard (add word exposed, correlate def exposed)
• Voltage, Nominal (add Note DC battery voltages, NEC correlation)
• Working On (wording change, electrical equipment conductors or circuit parts)
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• [Reorganization of context, content flow, intent, etc.. Articles moved. Article number changes.]
• Article 105.4 Priority moved to Article 110.1. Notes updated, ref Annex F elimination, new wording Electrically Safe Work Condition definition.
• Article 110.1 Priority
• Article 110.2 General
• Article 110.3 Electrically Safe Work Condition
• Article 110.4 Energized Work
• Article 110.5 Electrical Safety Program
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• Intent is communicating elimination is the first priority.
• Electrically Safe Work Condition.
• Energized work shall be justified.
• Normal operating conditions defined.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• (new Article numbers because of reorganization).
• Article 110.5 Electrical Safety Program (note, delete reference to ANSI Z10, point to Annex P).
• Article 110.5 (H)(1) (wording made generic that a “process to be used”, removing the words “by the employer”).
• Article 110.5(I)(1) Job Safety Planning (note change, NEW Annex J example job safety planning checklist added).
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• (new Article numbers because of reorganization).
• Article 110.5 (L) Lockout/Tagout Program (clarify that this
Program can be a part of Electrical Safety Program or separate with employer’s overall OHSMS)
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• (new Article numbers because of reorganization).
• Article 110.6 Training Requirements (A) Electrical Safety Training (1) Qualified Person - (Added Item f. employer via
supervision or inspections annually confirm that employees are complying with Standard).
• Article 110.6 Training Requirements (A) Electrical Safety Training (4) Type of Training (added wording “Classroom
training can include interactive electronic or web-based training components”).
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 110 GENERAL REQUIREMENTS FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES
• (new Article numbers because of reorganization).
• Article 110.8 Test Instruments and Equipment (A) Testing (deleted reference to operating voltages, 50V replaced with
“where an electrical hazard exists”).
• Article 110.9 Portable Cord-and-Plug-Connected Electric
Equipment (D) Conductive or Wet Work Locations (added “or
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 120 ESTABLISHING AN ELECTRICALLY SAFE WORK CONDITION
• Article 120.2 Lockout/Tagout Principles (B) Lockout/Tagout Procedure (added sentence “The procedure shall meet the requirements of applicable codes, standards, and regulations for lockout and tagging of electrical sources.”).
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 120 ESTABLISHING AN ELECTRICALLY SAFE WORK CONDITION
• Article 120.4 Lockout/Tagout Procedures (B) Elements of Control (2) Stored Energy (new Note added for reference to new capacitor content in new Article 360 Safety-Related
Requirements for Capacitors and new Annex R Working With Capacitors).
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 120 ESTABLISHING AN ELECTRICALLY SAFE WORK CONDITION
• Article 120.5 Process for Establishing and Verifying an
Electrically Safe Work Condition (8 step procedure/process).
• Wording changes (5):
• “Block or relieve stored nonelectrical energy in devices to the extent the circuit parts cannot be unintentionally energized by devices.”
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 120 ESTABLISHING AN ELECTRICALLY SAFE WORK CONDITION
• Article 120.5 Process for Establishing and Verifying an Electrically Safe Work Condition
• Wording changes (7):
• Delete “verify it is de-energized” and change to ”test for absence of voltage.”
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 120 ESTABLISHING AN ELECTRICALLY SAFE WORK CONDITION
• Article 120.5 Process for Establishing and Verifying an Electrically Safe Work Condition
• Wording changes (7) Exception No. 1 to 7: (wording changes):
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• Some Articles relocated to Article 110 as noted.
• Renumbering of Articles.
• Article 130.1 General (revised wording, to clarify intent, use of information in Article 130).
• Article 130 covers requirements, work involving electrical hazards, work practices, assessments, precautions, and procedures when electrically safe work condition cannot be
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• Article 130.1 General (revised wording, to clarify intent, use of information in Article 130).
• Use work practices and safeguard employee from injury when exposed to electrical hazards.
• If energized conductors or circuit parts voltage equal to or
greater than 50V work is performed based on justification the following requirements shall apply:
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• [new content]
• 1. Only Qualified Persons.
• 2. EEWP may be required.
• 3. Shall complete a Shock Risk Assessment.
• 4. Shall complete an Arc Flash Risk Assessment.
• All requirements of Article 130 apply whether incident energy
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• Article 130.5(G) Incident Energy Analysis Method.
• List item ”e” added to clarify that for outwear that is worn over arc-rated clothing as protection from elements or for other
purposes, doesn’t have to be greater than or equal to calculated incident energy exposure. The primary arc-rated clothing
underneath it will be.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• Article 130.7 (C)(1) General (new Note added to provide
guidance of what the “user” can do if arc-rated clothing is not available that is equal to or greater than calculated incident energy only for absence of voltage testing, risk reduction).
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 1, ARTICLE 130 WORK INVOLVING ELECTRICAL HAZARDS
• (new content)
• 1. Use non-contact proximity test instrument secondary side of transformer before using contact test instrument.
• 2. If equipment design allows observe visible disconnect.
• 3. Increase the working distance.
• 4. Consider system design options to reduce the incident energy level.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 2, SAFETY RELATED MAINTENANCE REQUIREMENTS
• Refer to NFPA 70E 2021.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 3, SAFETY REQUIREMENTS FOR SPECIAL EQUIPMENT
• Article 320 Safety Requirements Related to Batteries and Battery Rooms 320.3 Safety Procedures (A) General Safety Hazards (2) Battery Risk Assessment
• Added content Note. Refer to Annex F for battery risk assessment flow chart.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• CHAPTER 3, SAFETY REQUIREMENTS FOR SPECIAL EQUIPMENT
• NEW Article 360 Safety-Related Requirements for Capacitors
• Completely new Article.
• Laboratory research and Public Comment.
• New Annex R Working With Capacitors complimentary to Article 360, more detailed information.
NFPA 70E 2021 Public Comments, Second
Revision, Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• ANNEXES
• (updates, changes or new)
• Annex D – IEEE 1584 2018 content additions. All formulas deleted.
• Annex J - Job Safety Planning Checklist example form added.
• Annex R – [NEW] Working With Capacitors
CSA Z462 2021 Expected Changes
• NOT ALL POTENTIAL CHANGES WILL BE REVIEWED.
• Goal is to remain technically harmonized with NFPA 70E.
• Reviewing existing CSA Z462 Table 6A, NFPA 70E Table 130.7 (C)(15)(a).
• New Annexes, Switching & Isolation, Temporary Protective Grounding.
• Updates to Annex O Safety-Related Design Requirements.
• Updates to Annex Q Equipment Labeling (not in 70E).
Conclusion
• 70E and Z462 follow formal processes for public input or request for amendment.
• 70E and Z462 required interpretation and effective implementation, not adopted into OSHA or OH&S law.
• GOOD NEWS, 2021 NFPA 70E and CSA Z462 2021 quantity and significance of changes is reduced.
• When published, employer needs to review published changes.
Conclusion
• Update your company’s Electrical Safety Program.
• Provide NFPA 70E/CSA Z462 2021 Edition Arc Flash & Shock Training to employees.
• Provide Electrical Safety Program update training to your employees.
Questions
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Conclusion
• THANKs to EASYPOWER!
• THANK YOU for attending?
• Terry Becker, P.Eng., CESCP, IEEE Senior Member
• 1-587-433-3777
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